<template>
  <transition name="fade">
    <section>
      <div class="loading">
        <span />
        <span />
        <span />
        <span />
        <span />
        <p class="desc">{{ title }}</p>
      </div>
    </section>
  </transition>
</template>
<script>
export default {
  props: {
    title: {
      type: String,
      default: '切换年份中...'
    }
  }
};
</script>
<style scoped lang="css">
    .fade-enter-active,
    .fade-leave-active {
        transition: opacity .5s;
    }
    .fade-enter,
    .fade-leave-to
    /* .fade-leave-active below version 2.1.8 */
        {
        opacity: 0;
    }
    section {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, .3);
        z-index: 999;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .loading {
        width: 100%;
        text-align: center;
        /* flex-direction: column; */
    }
    .loading span {
        display: inline-block;
        width: 8px;
        height: 100%;
        border-radius: 4px;
        background: lightgreen;
        -webkit-animation: load 1s ease infinite;
        margin-left: 5px;
    }
    @-webkit-keyframes load {
        0%,
        100% {
            height: 40px;
            background: lightgreen;
        }
        50% {
            height: 70px;
            margin: -15px 0;
            background: lightblue;
        }
    }
    .loading span:nth-child(2) {
        -webkit-animation-delay: 0.2s;
    }
    .loading span:nth-child(3) {
        -webkit-animation-delay: 0.4s;
    }
    .loading span:nth-child(4) {
        -webkit-animation-delay: 0.6s;
    }
    .loading span:nth-child(5) {
        -webkit-animation-delay: 0.8s;
    }
    .desc {
        font-size: 14px;
        color: #fff;
        padding-top: 15px;
    }
</style>
